Weft stop motion



July 18, 1950 v. M. J. ANCET WEFT STOP MOTION 2 Sheets-Sheet 1 Filed March 18, 1948 r INVENTOR I/IGTHR max/E r M N N n E H 3 0 y 1950 v. M. J. ANCET 2,516,042

WEFT STOP MOTION Filed March 18, 1948 2 Sheets-Sheet 2 INVENTOR Vmron Mme/E rLsE /I A /vc referred ,to-,@wh th;

Patented July 18, 1950 WEFT'J'STOP MOTION Vic or :Mar o enhrAn ti Lyons- Fr nce; s;

signer-to Re ina's-1A.;- Heale s; w rloccop Application March 18, 1948;"Seria1,Noi 15,557- In France April'-18 -1947 This;inrentionrrelatesntcvweitstop mctiens or:

distance; from the fell, :of thedahricjand is sulosefl quentlyrbeaten-up. by era-member; whichtravelswith the .shuttie ctoiwthe rea-luthereof and -1nay,in some;

loomed 'benthje [fol1owin ;.;shuttle. More; particularly, thermventi n is ac n r nedwv t e-mv Lstom motion for 1392111 circular, -loom ,of the;-kind ada-pted to-engage the wetts yam-betw n the: point wher it l v si hutt1 andcthespointiwhere the loom. o

The-stop: motion of theinvention is, 0t the'electrical type and 1 includes a circuit containinga, painxofrcontacts;wok-which one ispfixed and; the other :m v-a lezs The-z co ta t a e t i d y support traveling --with:;;th e shuttle: to the rearsthereof-and the support also carries -afreB1y,r-rotestable wheel-ihay-ing radial teeth adapted-t0 enr gagerthe g weftw, yarn: lying between warp, threads. and-not yet beaten=up.- The engagement ofthe eaten nnfand op rates, whenrtheziwcft yarn-1srm1ssine 0r; r ken; to: p-r.

ends .oftheteethwith the ,weityarn determinesthe;relativeapositions of the ,teeth I and the warp, threads and, it the yarn is-broken orv-missinathe, relativepositions change and-,this resultsin theoperation of means for moving-themovab1e .con a tactrelatively, to .:the fixed contact. Such ;move

merit of ,themovable: contact then =altersfithe ,cii-

cuit, as, for example, by closing it, ;and-,this,canses the operation of conventional means? for stopping the, loom;

In 111185 preferred form of the new stop .motiom the: freely: tat blewheel, whenin nga em nt r with the weft yarn; forces, the warp rthreads,, ber tween, which. the yarn ,lies, slightly; out of ,their normal positions-c Adetector mounted tetravel with thewheel and connected to, the movable,"

C nt ct normally l e vou rovf nsagementiwi h th warp threads, but if the weft yarn breaks r01, is,v

absent, thewarp threads ententhe spacesbetween the teeth and f engage theuend gof the, detecton so, that; as the detector, advances with the wheel, it

is swung, and .moves the movable contact to ,alter the, circuit andstop ,the loom.

In a ,modified construction, the-toothed wheel: is not supported zin fixedposition-on asupport traveling with the; nshuttlecbut. on one end1,of;.a lever pivoted on the supportcandzcarrying; the;

movable-contact .on its other end,, The lever is acted-Von -by- :a spring and i-urgesrthewheel toward,

the sheet oi warp threadswithin 1which1the. -\wett:-. yarn lies: The ends of the teeth of' thevwheel a eth weft yarn andthisal mitsthemovement;

GCIaims (Cl. 139-!370) M of the; lever anclwheel. Howeven'if'the yarn is; missing,"the lever is swung towcause the teeth -of thee-wheel to. pass betweenthe warp, threadsyand m in such movement of the leverthe movableacon tactisgmoved relatively to the fixed contact, thecircuit is altered,- and theloom isstopped.

For: a better understanding of the" invention, 7 reference may. be-made to the accompanying;

drawings; a in which:

Fig. 1 is: a diagrammatic view in side, elevation showing; one oform of the new stop motion and associated parts;

Fig; 2 :is, a viewr-in side-elevation of,part of the stonmotironaa pen te F1 horizontal sectional ,view: showing the a interior ot apart oi' the; stop motion; and

Figs;; 6 ahd w'l are diagrammatic plan views ShQWin j modified form of the new. stop motion. 1 In the? circular loom, of ,which portions are 11- lustrated: in Fig. 1, theshuttle Bis of the cylin-, drical type and it iscarried ,bya frame] I provided withyagrollen [2, which rolls overthe loom reed. The -shuttle oontains a package, ofweft thread l3; whichissues fro-manopening in the top of the gshuttle and passes throug-h: a vguide eye 14a,

in E an; upward-1 and rearward extension M. 'from frame, 1| I; forming a trolley. Theashuttle travels L through; the warp shed, which opens ahead of thez shuttle and closes behinddt, and the weft, thread issuing fromthe guide eye 14a lies close to the fell of the fabric and is beaten up by a beateup wheel I5, which ismo nted ona pin; 16 The Ol1.=1-;911'1 arm, I'IV advancin with the shuttle. beatmpwheel may .be of thegconstruction disclosed in my-fcopending application, Serial No,

610,437, :filedAugust 13, .1945. T

carried by arod 20,=which;extends through a bearing, 2| andis adjustable lengthwise, of the bearing bymeans of a screwc22 threaded througlr the hear-ingand engaging anarm Z3Hfast on the rod, The bearing ismounted on a rod 2t,v which extendsthrough an openingin one end of an arm 25.;m0untedtomotate about: the centraLaXis 26 The lowenendofrod-Jhis threaded-and carries 1 a nut-1 .of theloom at thesame rate as the shuttle.

2 1;. which: can be =turned to adjust the a vertical position of the rod. The rod 24 is encircled by ak spring 28aone end. of; which engages bearing 2,!

andrthewot e e .:o wh ch b a a t h nd-1 I Figs- 3;. and- 4e are;- diagrammatic plan; views; showinggthe manner, in which 1 the, stop motion r Theweft stop motion of the invention comprises,v a; ,toothed; [wheel "3 having long narrow teeth \l8a;and rotatab1y ,mounted on a spindle l9 3 of arm 25. When the wheel 18 is in its proper position of adjustment, one or more of its teeth l8a engage the length of Weft thread I3 between the guide eye [4a in trolley l4 and the beat-up wheel I5 and at a point close to the beat-up wheel. As a result the warp threads 29 are slightly deformed, so that they lie outwardly from their normal positions 29a. M

A plate 30 of insulating material is mounted fast on'spindle I9 above the wheel l8 and a shaft 3| is mounted for oscillation in openings through plate 30 and through a metal plate 32 attached to the upper face of plate 39 and grounded through a connection 33.

carries a detecting finger 34 havinga toothed 4 the horizontal length of weft thread 62 between the beat-up wheel (not shown) and the guide eye of trolley 63 of the frame carrying the shuttle. The engagement of the ends of the teeth 49a with the weft thread causes the wheel and lever 50 to be held against the action of spring 59, so that contacts '53, 54 are open. If the weft thread breaks, as indicated at 62a (Fig; 77)., the wheel 49 is free to be moved outwardly by the action of spring 56 on lever 50, with the teeth 49a of the wheel penetrating the sheet of warp threads.

.This movement of the wheel and lever causes contact 53, 54 to be closed so that solenoid 59 is At its lower encl,'the shaft 3| end, which lies outwardly beyond ,the edge, ofplate 39 and terminates inwardly from the ends of the teeth I801. on wheel l8. At its other end,

the shaft carries a contact 35, which is con'-" nected by a spring 36 to a pin 13! on the plate 30.

The spring tends to hold contact 35 against a stop pin 38 on plate 32 and, in this position'of the parts, the finger 34-extends radially. A contact spring 39 is carried by a stud 40-mounted in an opening in plate 30, and the stud is provided with an arm 4] projecting outwardly beyond the edge of plate 30 and provided at its end with a terminal post 42. Post 42 is connected in a circuit including a battery 43 and a solenoid 44,

which, when energized, opens aswitch 45 in a circuit 46 controlling the supply of current to the motor 4! driving the loom.

In the normal operation of the loom, as shown in Fig. 3, the arm 25 rotates about the axis of the loom with wheel l8 rolling along the horizontal length of weft thread l3 between the guide eye 14a and the beat-up wheel l5. of the ends of the teeth'with the weft'thread forces the warp thread 29 outwardly from the axis of the loom, so that the toothed end of finger '34 does not engage the threads If the weft thread breaks, as shown at l3a, the warp threads 29 move back to their normal positions 29a and enter between the teeth l8a on wheel [8. The toothed end of finger 34 then comes in contact with either the warp threads or the fabric 48, and, as arm 25 continues its movement, the finger 34 is The engagement swung to the position shown in Fig. 4. At the same time, the contact 35 on shaft 3| engages the contact spring 39 closing the circuit through solenoid 44, so that the solenoid is energized and opens switch 45. This results in cutting off the supply of current to the motor 41 and the 10cm stops. 7

The modified construction shown in Figs. 6 and 7 includes a wheel 49 having long narrow teeth" which, upon swinging of the lever, engages acontact 54 on an arm mounted on and insulated from arm 5|. One end of lever 59 is connected through a spring 55 to an arm 51 fast on arm 5|, the spring urging the lever to swing to cause contacts 53, 54 to engage. Contact 54 and its arm 55 are in a circuit 58 through a solenoid 59, which controls a switch 69 and includes'afbattery 6|. Switch 59 is in a circuit controlling the loom driving motor (not shown) and, when opened, cuts 01f the supply of current to the motor.

In the normal operation of the apparatus shown in Figs. 6 and '7, the toothed wheel 49 rolls over energized, switch 69 is opened, and the supply of current to the motor driving the loom is cut off.

What I claim is:

1. In a weft stop motion for use in a circular loom having a shuttle traveling through the warp shed to lay a weft yarn between the warp threads and parallel to and spaced from the fell of the fabric and a device traveling with and behind the shuttle to beat up said yarn, the combination of a support traveling with the shuttle and means mounted on the support for altering a circuit, said meansincluding a pair'of contacts, one contact being movable and inserted in the circuit, a freely rotatable wheel having radial teeth engageable with the weft yarn to determine the relative positions of the teeth and the warp threads between which the yarn lies, and means operable, when the weft yarn is absent, by a change in the relative positions of the teeth and warp threads to move the movable contact relatively to the other contact.

2. In a weft stop motion for us in a circular loom'having a shuttle traveling through the warp' shed to lay a weft yarn between the warp threads and parallel to and spaced from the fell of the fabric and a device traveling with and behind the shuttle to beat up said yarn, the combination of a support traveling with the shuttle, a freely rotatable wheel on the support having radial teeth engageable with the weft yarn'to hold the warp threads, between which the yarn lies, out of their normal positions, the warp threads entering the spaces between the teeth, when the yarn is absent, a pair of contacts carried by the support, one contact being movable, and means connected to the movable contact and engaged and moved by the warp threads, when they lie between the teeth, to move said contact.

3. In a weft stop motion for use in a circular loom having a shuttle traveling through the warp shed to lay a weft yarn between the warp threads and parallel to and spaced from the fell of the fabric and a device traveling with and behind the shuttle to beat up said yarn, the combination of a support traveling with the shuttle, a freely rotatable wheel on the support having radial teeth engageable with the weft yarn to hold the warp threads, between which the yarn lies, out of their normal positions, the warp threads entering the spaces between the teeth, when the yarn is absent, a pair of contacts carried by the support, one contact being movable, and a finger carried by the support and connected to the movable contact, the finger being engaged by the warp threads, when they enter between the teeth, and swung to move the movable contact relatively to the other contact.

4. In a weft stop motion for use in a circular loom having a shuttle traveling through the Warp shed to lay a weft yarn between the warp threads and parallel to and spaced from the fell of the fabric and a device traveling with and behind the shuttle to beat up said yarn, the combination of a support traveling with the shuttle, a freely rotatable wheel on the support having radial teeth engageable wih the weft yarn to hold the warp threads, between which the yarn lies, outof their normal positions, the warp threads entering the spaces between the teeth, when the yarn is absent, a pair of contacts carried by the support, one contact being movable, and a finger carried by the support and connected to the movable contact, said finger normally extending radially of the wheel and having an end engaged by the warp threads, when they enter between the teeth, the movement of the support thereafter causing the finger to swing and move the movable contact relatively to the other contact.

5. In a weft stop motion for use in a circular loom having a shuttle traveling through the warp shed to lay a weft yarn between the warp threads and parallel to and spaced from the fell of the fabric and a device traveling with and behind the shuttle to beat up said yarn, the combination of a support traveling with the shuttle, a spindle carried by the support and extending in the same general direction as the warp threads, a wheel freely rotatable on the spindle and having teeth engageable with the weft yarn to hold the warp threads, between which the yarn lies, out of their normal positions, the warp threads entering the spaces between the teeth when the yarn is absent, a plate fast on the spindle, a fixed contact carried by the plate, a finger pivoted on the plate and having an end engaged by the warp threads, when they enter between the teeth, a movable contact attached to the finger, and a spring urging the finger to one position, the movement of the support after the end of the finger has been engaged by the warp threads causing the finger to swing and move the movable contact relatively to the other contact.

6. In a weft stop motion for use in a circular loom having a shuttle traveling through the warp shed to lay a weft yarn between the warp threads and parallel to and spaced from the fell of the fabric and a device traveling with and behind the shuttle to beat up said yarn, the combination of a support traveling with the shuttle, a fixed contact on the support, a lever pivoted on the support, a movable contact on one end of the lever, a freely rotatable wheel on the other end of the lever, the wheel having radial teeth engageable with the filling yarn and holding the wheel and lever in one position, and a spring urging the lever toward a second position and effecting, when the weft yarn is absent, the movement of the lever to alter the relative positions of the contacts.

VICTOR MARIE JOSEPH ANCET.

No references cited. 

